I'm having problem register my device to an application. My initPushwoosh is exactly same as sample project. I even received the token from the pushNotification.registerDevice. But when I login to Pushwoosh and check my application, it showing 0 subscribers.

If you receive MismatchSenderId please check that server key you have used in Pushwoosh Control panel matches the Project ID you have used in the app. Also sometimes it helps switching the server key with the browser key.